Tallas Pumps D-Boost Series, Instruction For Installation And Maintenance, Page: 11 / 44

ENGLISH
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10. PRECAUTIONS
RISK OF FROST: when the pump remains inactive at a temperature lower than 32 F, it is necessary to ensure that there
is no water residue which could freeze, causing cracks in the plastic parts.
If the pump has been used with substances that tend to form a deposit, or with water containing chlorine, rinse it after use
with a powerful jet of water in order to avoid the formation of deposits or encrustations which would reduce the
characteristics of the pump.
11. MAINTENANCE AND CLEANING
In normal operation the pump does not require any type of maintenance. In any case, all repair and maintenance work
must be carried out only after having disconnected the pump from the supply mains. When restarting the pump, ensure
that it has been correctly reassembled, so as not to create a risk for persons and property.
11.1 Cleaning the suction filter
Fig.3

Switch off the electric power supply to the pump.

Drain the pump, opening the drainage cap
(6), after having first closed the gate valves
upstream (if present).

Unscrew the cover of the filter chamber, with
your hands or with the appropriate tool
provided

Extract the filter unit from the top

Rinse the cup under running water and clean
the filter with a soft brush.

Reassemble the filter, performing the
operations in inverse order.
11.2 Cleaning the NRV
(Fig.4)

Switch off the electric power supply to the pump.

Remove the cap of the NRV (5) with the accessory
provided.

Remove the NRV check valve and clean it to remove
any dirt fig.9

Assemble the parts, proceeding in inverse order to
disassembly.
12. TROUBLESHOOTING
Before taking any troubleshooting action, disconnect the pump from the power supply (i.e. remove
the plug from the socket). If there is any damage to the power cable or pump, any necessary repairs
or replacements must be performed by the manufacturer or his authorized customer support
service, or by an equally-qualified party, in order to prevent all risks.
FAULT CHECKS (possible cause) REMEDY
1. The motor does not
start and makes no
noise.
A. Check the electric connections.
B. Check that the motor is live.
C. Check the protection fuses.
D.
Possible intervention of thermal
protection
C. If they are burnt-out, change them.
D. Wait about 20 min until the motor cools.
Check and eliminate the cause.
N.B. : If the fault is repeated immediately this
means that the motor is short circuiting.
1. The motor does not
start but makes
noise.
A. Ensure that the mains voltage is the
same as the value on the plate.
B. Look for possible blockages in the pump
or motor.
C. Check that the shaft is not blocked.
D. Check the condition of the capacitor.
B. Remove the blockage
C. Use the tool provided to release the
shaft.
D. Replace the capacitor
3. The motor turns with
difficulty.
A. Check the voltage which may be
insufficient.
B. Check whether any moving parts are
scraping against fixed parts.
B. Eliminate the cause of the scraping.
4. The pump does not
deliver.
A. The pump has not been primed
correctly.
B. The diameter of the intake pipe is
insufficient.
C. NRV non-return valve or filter clogged.
A. Fill the pump with water and prime it,
taking care to let air out by unscrewing
the vent cap.
B. Replace the pipe with one with a larger
diameter.
C. Clean the filter and, if this is not sufficient,
the NRV.
5. The pump does not
prime.
A. Suction pipe is taking in air..
B. The downward slope of the intake pipe
favours the formation of air pockets.
A. Eliminate the phenomenon, checking
that the connections and the suction pipe
are airtight, and repeat the priming
operation.
B. Correct the inclination of the intake pipe.
6. The pump supplies
insufficient flow.
A. The suction pipe is clogged.
B. The impeller is worn or blocked.
C. The diameter of the intake pipe is
insufficient.
A. Clean the suction pipe..
B. Remove the obstructions or replace the
worn parts.
C. Replace the pipe with one with a larger
diameter.